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Ultrafast Spectroscopy of Quantum Confined States in a Single CdSe Nanowire

Title data

Schumacher, Thorsten ; Giessen, Harald ; Lippitz, Markus:
Ultrafast Spectroscopy of Quantum Confined States in a Single CdSe Nanowire.
In: Nano Letters. Vol. 13 (April 2013) Issue 4 . - pp. 1706-1710.
ISSN 1530-6992
DOI: https://doi.org/10.1021/nl400259f

Abstract in another language

We measure for the first time transient absorption spectra of individual CdSe nanowires with about 10 nm diameter. Confinement of the carrier wave functions leads to discrete states which can be described by a six-band effective mass model. Combining transient absorption and luminescence spectroscopy allows us to track the excitation dynamics in the visible and near-infrared spectral range. About 10 of all absorbed photons lead to an excitation of the lowest energy state. Of these excitations, less than 1 lead to a photon in the optical far-field. Almost all emission is reabsorbed by other parts of the nanowire. These findings might explain the low overall quantum efficiency of CdSe nanowires.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik III - Nanooptik > Lehrstuhl Experimentalphysik III - Nanooptik - Univ.-Prof. Dr. Markus Lippitz
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik III - Nanooptik
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 13 Nov 2015 13:47
Last Modified: 13 Nov 2015 13:47
URI: https://eref.uni-bayreuth.de/id/eprint/22212